Film forming composition, hardcoat film, polarizing plate, and method for manufacturing hydrophilized hardcoat film

Abstract

According to the present invention, there are provided a film forming composition, which contains a polymer having a repeating unit represented by General Formula (I) and a curable compound, an optical film having a film formed of the composition, a hardcoat film, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film. In General Formula (I), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, L represents an ester bond, an ether bond, a phenylene group, or an amide bond, R2 and R4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or a halogenated alkyl group having 1 to 20 carbon atoms, and R3 represents a hydrogen atom or a substituent.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation of International Application No. PCT / JP2016 / 086622 filed on Dec. 8, 2016, which was published under Article 21(2) in Japanese, and which claims priority under 35 U.S.C. § 119(a) from Japanese Patent Application No. 2015-247995 filed on Dec. 18, 2015. The above applications are hereby expressly incorporated by reference, in their entirety, into the present application.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention relates to a film forming composition, an optical film, a hardcoat film, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film.2. Description of the Related Art[0003]In image display devices such as a display device using a cathode ray tube (CRT), a plasma display panel (PDP), an electroluminescence display (ELD), a vacuum fluorescent display (VFD), a field emission display (FED), and a liquid crystal display (LCD), it is preferable that a hardcoat...

AI Technical Summary

Benefits of technology

[0010]Generally, the leveling agent, which is added to the hardcoat layer from the viewpoint of the surface condition uniformity, is a surfactant having hydrophobicity such as a fluorine-containing polymer, and accordingly, the hydrophilicity of the surface of the hardcoat layer decreases.

[0014]An object of the present invention based on the issues described above, that is, a problem to be solved by the present invention is to provide a film forming composition, which makes it possible to form a film having excellent surface condition uniformity and being able to be improved in terms of lamination properties with respect to other layers by a simple treatment, a hardcoat film having a film formed of the composition, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film which has excellent surface condition uniformity and exhibits excellent lamination properties with respect to other layers.

[0015]The film forming composition of the present invention contains a fluorine-containing polymer having a repeating unit represented by General Formula (I). Therefore, the composition can form a film having excellent surface condition uniformity and hydrophilize the film surface by treating the film with an aqueous alkali solution (alkali treatment). The polymer represented by General Formula (I) has a fluorine-containing group having a branched structure on a side chain. Therefore, the polymer has especially strong electron-withdrawing properties, is easily hydrolyzed by the alkali treatment, and the fluorine-containing group is eliminated. The film surface is considered to be hydrophilized by the above mechanism. Furthermore, it is considered that after the hydrolysis, sometimes the polymer may be converted into a hydrophilic group such as a carboxyl group, and hence the film surface is hydrophilized.

[0017]The inventors of the present invention have also found that even in a case where a surface panel and a display module to be used as a touch panel are bonded to each other by means of filling a space therebetween with an optically clear resin (OCR), by using the film forming composition of the present invention in a hardcoat layer of the surface of the display module, it is possible to improve the wettability and the adhesiveness of OCR.

[0030]According to the present invention, it is possible to provide a film forming composition, which makes it possible to form a film having excellent surface condition uniformity and being able to be improved in terms of lamination properties with respect to other layers by a simple treatment, a hardcoat film having a film formed of the composition, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film which has excellent surface condition uniformity and exhibits excellent lamination properties with respect to other layers.

Problems solved by technology

In a case where the surface of a hardcoat layer is coated with a resin composition for forming other layers such that other layers are laminated, provided that the surface of the hardcoat layer has low hydrophilicity, unfortunately, the resin composition for forming other layers is repelled without wetting and spreading on the surface, or thickness unevenness occurs in other layers.

As a result, a trade-off between the surface condition uniformity of the hardcoat layer and the lamination properties with respect to other layers becomes a problem.

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